Canon I-Sensys LBP5050, Service Manual

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Chapter 5
5-2
T-5-2
5.1.4 Adjustment of Fixing System
5.1.4.1 Nip-width specifications
0019-4181
LBP5050N / LBP5050
The nip-width of the fixing unit is not adjustable in this printer, however the
improper nip-width may causethe poor fixing.
Follow the procedures below to check the nip width.
1) Prepare an all-black print of A4 size that is printed with the same type of
cartridge for the printer before visiting the user.
2) Load the printed sheet facing DOWN in the cassette.
3) Print a blank page from an external device.
4) Open the front door after 25 seconds. Wait for over 10 seconds and re-
move the paper from the printer.
5) Measure the width of the glossy band across the paper and check if it
meets the requirements below:
- Center (a): 6.0 ±1mm
- Side (b), (c): 5.0 to 7.5mm
- Right-Left asymmetry (|b-c|): 1.0mm or less
F-5-4
The information in the NVRAM on the DC controller PCB is saved in
the
NVRAM (IC2S) as backup data.
When replacing the NVRAM, perform the same operation as replacing
the
main controller PCB and execute the following item; Option Menu >
Service Mode > Printer Information settings > DCON data back up.
Paper feed direction
c
a
b
Center of
A-4 sized paper